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Last seen: Nov 3, 2026
This is the point that I was getting at earlier, when you measure the heat delivered to the house by the primary heat source, the number you get is (a...
@rob-of-york — thanks again for a clear helpful explanation. If I can summarise, I think the key point is that the heat from other sources stays prett...
I get the general principle. My contention is that you need to sample often enough to get true average, since infrequent sampling may miss observation...
@rob-of-york — thanks again for posting in such such comprehensive and comprehensible detail, you are a great asset to the forum! I think the pro...
I suspect most if not all of the tank level measuring systems available will have been developed to tell the owner when they need to fill up their tan...
It's an enticing idea, but the problem is knowing the oil usage over the reference period to sufficient accuracy. All I had was a sight gauge on the s...
@ian33a — I'm not so sure about the numbers in the last spreadsheet excerpt you posted. If your average daily oil use is 6.58L, and if an average heat...
@jamespa — I can't argue with any of that. I also take the important point that what you need to know in practical terms for heat pump sizing is not w...
But that is using a range (6.6 to 10 kW) to rule out the 14-16 kW jokers! I've said I agree the method can be and often is useful as a sense/sanity ch...
But there is a whiff of whatiffery: (a) what if 'the number of degree days is fairly consistent from year to year'. But what if it is not? This can ...
That is indeed the take away message in my view. It would be very useful if we could find a way to use oil consumption to derive heat loss, but I thin...
When you say 'scientifically derived', does this mean from first principles (as you imply, using degree days, and if so what is the actual derivation,...
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Degrees of Separation
Latest Posts
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Interesting reading xlinks response in October to some ...
By Jeff , 15 minutes ago
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RE: Adding data centre electricity costs to domestic energy bills?
There's a company called Xlinks who are propos...
By Transparent , 31 minutes ago
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Why don't people choose heat pumps?
I was going to add this to the Boiler Upgrade Scheme fu...
By cathodeRay , 47 minutes ago
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RE: Boiler Upgrade Scheme funding reduced by circa £750 million in 2026 budget
Agree with everything else. Personally I think the as...
By JamesPa , 53 minutes ago
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RE: Aerotherm and weather compensation
@jamespa I replied yesterday with detailed readings whi...
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RE: Octopussy cosy 6 experience
@paultheheating Unless things have changed more recentl...
By Toodles , 20 hours ago
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RE: Marvel Heating liquidation
@editor This is an important point. each winter, you...
By davidnolan22 , 24 hours ago
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RE: Solar Power Output – Let’s Compare Generation Figures
Very nice. we’ve been super soggy here, but rather m...
By Papahuhu , 2 days ago
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RE: DIY powerflushing tutorial
Interesting! I toyed with the idea too. But I installed...
By bobflux , 2 days ago
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RE: 15kw pump for 225m2 1990's house - over kill?
@seaviews Agree with the others on sequence: loft first...
By mk1234 , 2 days ago
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RE: The Changing Jet Stream Could Challenge UK Air Source Heat Pumps
@etchedpixels Agreed, just a thought for others. I am...
By Watcher , 3 days ago
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RE: Vaillant ecoTEC Plus - Flow Temp and Set Up
Heating been on for 4 weeks now, continuous. It's 6C o...
By trebor12345 , 4 days ago
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Coming back on subject... A shortened version of the ...
By Transparent , 4 days ago
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RE: Say hello and introduce yourself
Perhaps it is time for an update on ‘our’ project. We h...
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